TY - GEN
T1 - A folded cascode OTA using current-mode gain-boost amplifier
AU - Ma, Lei
AU - Ding, Ying Tao
AU - Wang, Xing Hua
PY - 2010
Y1 - 2010
N2 - In this report, an OTA which is used in fully differential pipelined ADC was described. Using gain-boost architecture with current-mode single-ended amplifier, this OTA reduce parasitic taking by gain-boost amplifier to achieve high-gain and high-speed. Besides, a dual phase SC-CMFB circuit is introduced, and some methods are concerned to improve the performance. Then, by optimization the layout design, OTA's mismatch was reduced. This design was using SMIC 0.35um CMOS process and simulation both schematic and layout in Cadence. The result of the simulation shows that the OTA has a gain up to 105dB, a unity gain bandwidth of about 937MHz for a 2pF load, a settling time of about 4.4ns, a Common-Mode Range is 0.6V∼3.3V, a output swing is 0.6V∼3.1V, with the power supply of 3.3V, the dissipation is 39mW. This amplifier was used in a 10bit 100MHz pipelined ADC.
AB - In this report, an OTA which is used in fully differential pipelined ADC was described. Using gain-boost architecture with current-mode single-ended amplifier, this OTA reduce parasitic taking by gain-boost amplifier to achieve high-gain and high-speed. Besides, a dual phase SC-CMFB circuit is introduced, and some methods are concerned to improve the performance. Then, by optimization the layout design, OTA's mismatch was reduced. This design was using SMIC 0.35um CMOS process and simulation both schematic and layout in Cadence. The result of the simulation shows that the OTA has a gain up to 105dB, a unity gain bandwidth of about 937MHz for a 2pF load, a settling time of about 4.4ns, a Common-Mode Range is 0.6V∼3.3V, a output swing is 0.6V∼3.1V, with the power supply of 3.3V, the dissipation is 39mW. This amplifier was used in a 10bit 100MHz pipelined ADC.
UR - http://www.scopus.com/inward/record.url?scp=77957555112&partnerID=8YFLogxK
U2 - 10.1109/SMELEC.2010.5549417
DO - 10.1109/SMELEC.2010.5549417
M3 - Conference contribution
AN - SCOPUS:77957555112
SN - 9781424466092
T3 - IEEE International Conference on Semiconductor Electronics, Proceedings, ICSE
SP - 92
EP - 95
BT - ICSE 2010 - Proceedings IEEE International Conference on Semiconductor Electronics
T2 - 2010 IEEE International Conference on Semiconductor Electronics, ICSE 2010
Y2 - 28 June 2010 through 30 June 2010
ER -